Finding the Fourth Proportional to 1,431.63, 2,147.76 and 846.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.63 : 2,147.76 = 846.42 : x
2. Step 2: Convert to fraction form
   1,431.63/2,147.76 = 846.42/x
3. Step 3: Cross multiply
   1,431.63x = 2,147.76 × 846.42
4. Step 4: Simplify right side
   1,431.63x = 1,817,907.02
5. Step 5: Solve for x
   x = 1,817,907.02/1,431.63
6. Step 6: Final answer
   x = 1,269.82